EP 0458809 B1 19941026 - PISTON AND PROCESS FOR ACHIEVING CONTROLLED IGNITION.
Title (en)
PISTON AND PROCESS FOR ACHIEVING CONTROLLED IGNITION.
Title (de)
KOLBEN UND VERFAHREN ZUR ERZEUGUNG GEREGELTER ZÜNDUNG.
Title (fr)
PISTON ET PROCEDE POUR OBTENIR UN ALLUMAGE REGULE.
Publication
Application
Priority
- US 9000345 W 19900123
- US 31128989 A 19890216
Abstract (en)
[origin: US4898135A] A piston for a reciprocating piston internal combustion engine is provided with a reaction chamber (44, 144) communicating with a recessed area (42, 142) of the piston through a restricted continuous slot orifice (46, 146) that is configured to create a choked fluid flow condition between the combustion chamber (30, 130) and the reaction chamber at all engine operating speeds. Fuel is supplied to the reaction chamber and undergoes a controlled, cold frame reaction process while in intimate contact with the crown portion (54) of the piston (14). The reaction produces fuel radicals in sufficient quantity to seed subsequent fuel charges to properly condition the charge for predetermined desired ignition and combustion characteristics. The choking orifice (46, 146) ensures that outward flow of radicals from the reaction chamber is controlled to the extent that they will be maintained in the combustion chamber following an exhaust event of the combustion cycle so they will be available during a subsequent compression stroke of the piston for seeding the subsequent charge. The radical population in the subsequent charge conditions the charge to obtain dependable and predictable ignition in a compression ignition engine as well as knock free combustion at relatively lean air to fuel ratios in a spark ignited engine.
IPC 1-7
IPC 8 full level
F02B 21/02 (2006.01); F02B 23/00 (2006.01); F02B 23/06 (2006.01); F02B 23/08 (2006.01); F02F 3/26 (2006.01); F02F 3/28 (2006.01); F02B 1/04 (2006.01); F02B 3/06 (2006.01); F02B 75/12 (2006.01)
CPC (source: EP KR US)
F02B 21/02 (2013.01 - EP US); F02B 23/00 (2013.01 - EP US); F02B 23/0627 (2013.01 - EP US); F02B 23/0636 (2013.01 - EP US); F02B 23/0672 (2013.01 - EP US); F02F 3/26 (2013.01 - EP US); F02F 3/28 (2013.01 - EP KR US); F02B 1/04 (2013.01 - EP US); F02B 3/06 (2013.01 - EP US); F02B 23/0603 (2013.01 - EP US); F02B 23/0669 (2013.01 - EP US); F02B 2075/125 (2013.01 - EP US); F02B 2275/14 (2013.01 - EP US); F02B 2275/40 (2013.01 - EP US); Y02T 10/12 (2013.01 - EP US)
Designated contracting state (EPC)
AT DE ES FR GB IT SE
DOCDB simple family (publication)
US 4898135 A 19900206; AT E113342 T1 19941115; AU 4958990 A 19900905; CA 2046602 A1 19900817; DE 69013677 D1 19941201; DE 69013677 T2 19950302; EP 0458809 A1 19911204; EP 0458809 A4 19920311; EP 0458809 B1 19941026; ES 2062510 T3 19941216; JP 3181908 B2 20010703; JP H04505198 A 19920910; KR 920701646 A 19920812; KR 970001124 B1 19970128; WO 9009519 A1 19900823
DOCDB simple family (application)
US 31128989 A 19890216; AT 90902452 T 19900123; AU 4958990 A 19900123; CA 2046602 A 19900123; DE 69013677 T 19900123; EP 90902452 A 19900123; ES 90902452 T 19900123; JP 50248490 A 19900123; KR 910700914 A 19910816; US 9000345 W 19900123